#include<iostream>
#include<cstdlib>
#include<unistd.h>
#include<strings.h>
#include<string.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<netinet/in.h>
#include<arpa/inet.h>
#include<pthread.h>
#include"Terminal.hpp"

using namespace std;

void Usage(std::string proc)
{
    std::cout << "\n\tUsage: " << proc << "serverip serverport\n" << std::endl; 
}

struct ThreadData
{
    struct sockaddr_in server;
    int sockfd;
    std::string serverip; 
};

void *recv_message(void *args)
{
    ThreadData *td = static_cast<ThreadData*>(args);
    char buffer[1024];
    while(true)
    {
        memset(buffer, 0, sizeof(buffer));
        struct sockaddr_in temp;
        socklen_t len = sizeof(temp); 

        ssize_t s = recvfrom(td->sockfd, buffer, 1023, 0, (struct sockaddr*)&temp, &len);
        if(s > 0)
        {
            buffer[s] = 0;
            cerr << buffer << endl; 
        }
    }
}

void *send_message(void *args)
{
    ThreadData *td = static_cast<ThreadData*>(args);
    string message;
    socklen_t len = sizeof(td->server);

    std::string welcome = td->serverip;
    welcome += "comming...";
    sendto(td->sockfd, message.c_str(), message.size(), 0, (struct sockaddr*)&(td->server), len);

    while(true)
    {
        cout << "Please Enter@ ";
        getline(cin, message);
        sendto(td->sockfd, message.c_str(), message.size(), 0, (struct sockaddr*)&(td->server), len); 
    }
}

int main(int argc, char *argv[])
{
    if(argc != 3)
    {
        Usage(argv[0]);
        exit(0); 
    }

    std::string serverip = argv[1];
    uint16_t serverport = std::stoi(argv[2]);

    struct ThreadData td;
    bzero(&td.server, sizeof(td.server));
    td.server.sin_family = AF_INET;
    td.server.sin_port = htons(serverport);
    td.server.sin_addr.s_addr = inet_addr(serverip.c_str());

    td.sockfd = socket(AF_INET, SOCK_DGRAM, 0);
    if(td.sockfd < 0)
    {
        cout << "socket error" << endl; 
        return 1;
    }

    td.serverip = serverip;
    pthread_t recv, sender;
    pthread_create(&recv, nullptr, recv_message, &td);
    pthread_create(&sender, nullptr, send_message, &td);
    pthread_join(recv, nullptr);
    pthread_join(sender, nullptr);
    close(td.sockfd);
    return 0; 
}
